Comedo

What is a comedo?

A comedo (plural comedones) is plugged in follicular orifice.

• Open comedones (blackheads) are gray, orange, brown, or black papules. The keratinous contents can be expressed or extracted.
• Closed comedones (whiteheads) are non-inflamed, skin-colored papules. They must be pierced to remove their contents.

What conditions are characterized by a comedo?

Lesions and skin conditions in which prominent comedones are present include:

• Acneespecially common acne and comedonal acne
• Hidradenitis suppurativa
• Solar comedones (senile) and Favre Racouchot syndrome
• Discoid lupus erythematosus
• A seborrheic keratosis (best seen in dermoscopy)
• A compound or dermal papillomatous melanocytic nevus or Mole (best seen in dermoscopy)
• A new comedian
• A epidermal cyst (giant eater)
• A dilated pore of Winer

• Dilated pores.